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    Sale!

    Holley EFI HP EFI ECU, USB Cable, and Software 554-113

    Vendor: Holley EFI
    SKU: GVMR_554-113
    Save $307
    Sale Price $1,999.95 Regular Price $2,306.95
    Fast Fulfillment: In-stock parts typically ship same day or next business day.
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    Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost or water meth.


    Holley EFI HP EFI ECU, USB Cable, and Software 554-113


    Specifications:

    Description_INV HOLLEY EFI HP ECU
    Description_ASC When utilizing a trans brake, it is highly recommended to install our trans brake input protection device, Holley P/N 554-128. This will protect the ECU from any flyback voltage when the transbrake is released. Holley HP EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water/meth injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. When selecting an ECU, users need to ensure their planned controls can be run with the 4 inputs and 4 outputs as certain combinations may use more I/Os than are available. If more I/Os are required, users should choose the Dominator VMS. Certified to ISO 8846, SAE J1171, and United States Coast Guard Requirements for Ignition Protection and Fire Resistance.
    Description_DES HP EFI ECU
    Description_EXT HP EFI ECU, USB Cable, and Software
    Description_MKT Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost or water meth.
    Description_FAB “Quick Start” ignition and fueling strategy for LS x Engines
    Description_FAB Data Logger, scalable axes, smoothing, multiple graph view ability, rpe-defined notes fields and more
    Description_FAB Strip chart real-time data viewer
    Description_FAB Integrated Boost Control - Boost vs Time, Boost vs Gear (Time or RPM), Boost vs RPM, Boost vs Speed, Launch control, Boost launch builder, Over-boost safeties, Boost scramble
    Description_FAB Traction Control - Power reduction via timing, nitrous percentage or boost (requires Davis Technologies Holley Module)
    Description_FAB “Quick Start” fueling for all engines
    Description_FAB Option for VE based fueling strategy
    Description_FAB Fuel map and learn function smoothing
    Description_FAB Configurable user password protection
    Description_FAB Fully configurable lap top gauge panel
    Description_FAB Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
    Description_FAB Eight channel Distributorless Ignition (DIS) outputs capable of directly driving “Smart” ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
    Description_FAB Plug and Play control of factory GM 24x and 58x LSx engines
    Description_FAB Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
    Description_FAB Internal data-logging standard with a huge 2GB of memory
    Description_FAB 4 stage progressive nitrous control
    Description_FAB Turbo boost control
    Description_FAB Self-tuning fuel table strategy greatly simplifies tuning process
    Description_FAB Individual cylinder fuel and spark control allows you to unlock your engine’s potential
    Description_FAB Works with 4, 6, 8 cylinder engines
    Description_FAB Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
    Description_FAB Advanced idle, closed loop, and enrichment strategies allow for very stable operation
    Description_FAB ECU is fully potted and can be mounted in the engine compartment or interior
    Description_FAB Sealed automotive and marine grade connectors
    Description_FAB Allows for use of common OEM sensors as well as customer sensor calibration input
    Description_FAB Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process
    Description_FAB Custom settings can be configured to allow many other applications
    Description_FAB 1-5 Bar MAP sensor capability
    Description_FAB Two channel knock control sensor Inputs for both one or two wire knock sensors
    Description_FAB Dedicated fuel and oil pressure inputs
    Description_FAB Controls both stepper and PWM Idle Air Control (IAC) motors
    Description_FAB Speed density, Alpha-N, or combination fueling strategies
    Description_FAB 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
    Description_FAB 4 Stage nitrous oxide control
    Description_FAB Fully featured nitrous control eliminates the need for a separate nitrous controller device
    Description_FAB Can be configured “Wet” or “Dry” with closed loop feedback
    Description_FAB Progressive control based on time, RPM, or boost; requires part # 554-111
    Description_FAB Lean or rich safety cutoff
    Description_FAB Full timing retard/control configurability per stage based on RPM or time
    Description_FAB Integrated Water/Methanol injection control
    Description_FAB Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tubing
    Accelerometer Support Yes
    Boost Control Yes
    Brand Holley EFI
    CAN-BUS Support Yes
    Category Air and Fuel Delivery
    Coast Guard Approved Yes
    Coil Per Cylinder Ignition Support Yes
    Datalogging Support Yes
    Dry Nitrous Control Yes
    e85 Support Yes
    EGT Support Yes
    Emission Code 3
    Forced Induction Support Yes
    Fuel Filter Included No
    Fuel Hose Included No
    Fuel Injectors Included No
    Fuel Pressure Regulator Included No
    Fuel Pump Included No
    3390 Performance
    Ignition Timing Control Yes
    Individual Cylinder Fuel Corrections Yes
    Intake Manifold Included No
    Knock Retard Support Yes
    Multi-Stage Nitrous Control Yes
    Product Type HP ECU- ECM
    Progressive Nitrous Control Yes
    Self-Tuning Yes
    Throttle Position Sensor Included No
    Traction Control Support Yes
    User-Tuneable Yes
    Warning California Proposition 65
    Wet Nitrous Control Yes
    Accelerometer Support Yes
    Boost Control Yes
    Brand Holley EFI
    CAN-BUS Support Yes
    Category Air and Fuel Delivery
    Coast Guard Approved Yes
    Coil Per Cylinder Ignition Support Yes
    Datalogging Support Yes
    Dry Nitrous Control Yes
    e85 Support Yes
    EGT Support Yes
    Emission Code 3
    Forced Induction Support Yes
    Fuel Filter Included No
    Fuel Hose Included No
    Fuel Injectors Included No
    Fuel Pressure Regulator Included No
    Fuel Pump Included No
    3390 Performance
    Ignition Timing Control Yes
    Individual Cylinder Fuel Corrections Yes
    Intake Manifold Included No
    Knock Retard Support Yes
    Multi-Stage Nitrous Control Yes
    Product Type HP ECU- ECM
    Progressive Nitrous Control Yes
    Self-Tuning Yes
    Throttle Position Sensor Included No
    Traction Control Support Yes
    User-Tuneable Yes
    Warning California Proposition 65
    Wet Nitrous Control Yes
    Description_INV HOLLEY EFI HP ECU
    Description_ASC When utilizing a trans brake, it is highly recommended to install our trans brake input protection device, Holley P/N 554-128. This will protect the ECU from any flyback voltage when the transbrake is released. Holley HP EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water/meth injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. When selecting an ECU, users need to ensure their planned controls can be run with the 4 inputs and 4 outputs as certain combinations may use more I/Os than are available. If more I/Os are required, users should choose the Dominator VMS. Certified to ISO 8846, SAE J1171, and United States Coast Guard Requirements for Ignition Protection and Fire Resistance.
    Description_DES HP EFI ECU
    Description_EXT HP EFI ECU, USB Cable, and Software
    Description_MKT Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost or water meth.
    Description_FAB “Quick Start” ignition and fueling strategy for LS x Engines
    Description_FAB Data Logger, scalable axes, smoothing, multiple graph view ability, rpe-defined notes fields and more
    Description_FAB Strip chart real-time data viewer
    Description_FAB Integrated Boost Control - Boost vs Time, Boost vs Gear (Time or RPM), Boost vs RPM, Boost vs Speed, Launch control, Boost launch builder, Over-boost safeties, Boost scramble
    Description_FAB Traction Control - Power reduction via timing, nitrous percentage or boost (requires Davis Technologies Holley Module)
    Description_FAB “Quick Start” fueling for all engines
    Description_FAB Option for VE based fueling strategy
    Description_FAB Fuel map and learn function smoothing
    Description_FAB Configurable user password protection
    Description_FAB Fully configurable lap top gauge panel
    Description_FAB Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
    Description_FAB Eight channel Distributorless Ignition (DIS) outputs capable of directly driving “Smart” ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
    Description_FAB Plug and Play control of factory GM 24x and 58x LSx engines
    Description_FAB Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
    Description_FAB Internal data-logging standard with a huge 2GB of memory
    Description_FAB 4 stage progressive nitrous control
    Description_FAB Turbo boost control
    Description_FAB Self-tuning fuel table strategy greatly simplifies tuning process
    Description_FAB Individual cylinder fuel and spark control allows you to unlock your engine’s potential
    Description_FAB Works with 4, 6, 8 cylinder engines
    Description_FAB Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
    Description_FAB Advanced idle, closed loop, and enrichment strategies allow for very stable operation
    Description_FAB ECU is fully potted and can be mounted in the engine compartment or interior
    Description_FAB Sealed automotive and marine grade connectors
    Description_FAB Allows for use of common OEM sensors as well as customer sensor calibration input
    Description_FAB Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process
    Description_FAB Custom settings can be configured to allow many other applications
    Description_FAB 1-5 Bar MAP sensor capability
    Description_FAB Two channel knock control sensor Inputs for both one or two wire knock sensors
    Description_FAB Dedicated fuel and oil pressure inputs
    Description_FAB Controls both stepper and PWM Idle Air Control (IAC) motors
    Description_FAB Speed density, Alpha-N, or combination fueling strategies
    Description_FAB 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
    Description_FAB 4 Stage nitrous oxide control
    Description_FAB Fully featured nitrous control eliminates the need for a separate nitrous controller device
    Description_FAB Can be configured “Wet” or “Dry” with closed loop feedback
    Description_FAB Progressive control based on time, RPM, or boost; requires part # 554-111
    Description_FAB Lean or rich safety cutoff
    Description_FAB Full timing retard/control configurability per stage based on RPM or time
    Description_FAB Integrated Water/Methanol injection control
    Description_FAB Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tubing


    Shipping Policy

    Shipping Policy Last Updated: April 2026

    We're committed to getting your order to you as quickly and transparently as possible. Here's everything you need to know about how we ship.

    Order Cancellations

    Once an order is placed, cancellations are not guaranteed as orders are sent to fulfillment quickly. If you need to cancel, contact us immediately at sales@berryperformancesales.com. If a cancellation is possible, the buyer is responsible for any transaction fees incurred. If the order has already shipped, it cannot be cancelled and must go through our standard return process.

    Processing Time

    In-stock orders are typically processed and shipped within 1–2 business days of receiving payment, unless otherwise noted on the product page. Orders placed on weekends or holidays will be processed on the next business day.

    Shipping Costs

    Shipping costs are calculated at checkout based on the shipping method selected, package weight and dimensions, and destination address. You can review all shipping costs before finalizing your purchase.

    Estimated Delivery Times

    Domestic orders typically arrive within 1–7 business days after shipment, depending on your location and the carrier. Please note that delivery times are estimates and are not guaranteed. Delays due to weather, carrier volume, or other circumstances beyond our control may occur.

    Tracking Information

    Once your order ships, you will receive a confirmation email with tracking information. Use this to monitor your package's progress. If your tracking has not updated within 48 hours of receiving your confirmation email, please contact us and we'll look into it.

    Shipping Address

    Please ensure your shipping address is accurate and complete before placing your order. If you realize an error after ordering, contact us immediately at sales@berryperformancesales.com — we will do our best to make the correction, but changes cannot be guaranteed once an order is in fulfillment. We are not responsible for orders shipped to incorrect or undeliverable addresses due to customer error.

    Please note: We are unable to ship to P.O. Boxes. Please provide a physical delivery address at checkout.

    Lost or Stolen Packages

    If your tracking shows your order as delivered but you have not received it, please take the following steps:

    • Check around your property and with neighbors
    • Confirm the shipping address on your order was correct
    • Contact the carrier directly with your tracking number

    If the issue remains unresolved, contact us at sales@berryperformancesales.com within 5 business days of the marked delivery date. We will work with you and the carrier to investigate. Berry Performance Sales is not responsible for packages confirmed as delivered by the carrier or for packages stolen after delivery.

    Damaged in Transit

    If your order arrives visibly damaged, please refer to our Returns & Refunds policy for instructions on how to report the issue. Carrier damage claims must be reported within 48 hours of delivery.

    International Shipping

    We do ship internationally! Because shipping costs, carrier options, and transit times vary significantly by destination, international orders require a custom quote prior to purchase. To request a shipping quote, contact us at sales@berryperformancesales.com with the following:

    • Your country and full delivery address
    • The item(s) you are interested in ordering

    We will respond with a shipping quote as quickly as possible. Please note that customs duties, import taxes, and any other fees charged upon delivery are the sole responsibility of the recipient and are not included in your shipping quote. We recommend checking with your local customs office before placing your order.

    Off-Road Use Disclaimer

    All products are sold for off-road use only unless otherwise specified. The buyer assumes full responsibility for installation and operation. Berry Performance Sales is not liable for any incidental, indirect, or consequential damages including engine failure, labor charges, or vehicle downtime resulting from the use of any product sold. By placing an order, you acknowledge and accept these terms.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Return Policy

    Returns & Refunds Last Updated: April 2026

    We want you to love what you ordered. If something isn't right, here's everything you need to know.

    30-Day Return Window

    You have 30 days from the date of purchase to initiate a return. After this window, we are unable to accept returns. We do not offer exchanges — all approved returns are refunded per the terms below.

    How to Initiate a Return

    To request a return, contact us at sales@berryperformancesales.com with your order number and reason for return. All returns must be approved by our team before any item is shipped back to us. Once your return has been approved, your item must be shipped within 10 days of approval. Items shipped without prior approval or outside this window will be refused and returned to sender.

    Return Conditions

    To be eligible for a return, items must be:

    • Unused and in original condition
    • In original packaging
    • Inclusive of all parts and accessories

    Custom ordered products are non-returnable. If you're unsure whether your item qualifies, contact us before purchasing.

    Once we receive your return, we will inspect the item before processing any refund. We reserve the right to deny or adjust your refund if the item is received in a condition that differs from what was originally shipped — including signs of use, missing parts, or damage that occurred after delivery.

    Fees to Know Upfront

    We believe in being transparent about costs:

    • Restocking Fee: 20% — deducted from all return refunds
    • Return Shipping: Buyer's responsibility on all standard returns
    • Cancellation (Installment/Payment Plan): 7% fee to cover transaction costs
    • Cancellation (Credit Card/PayPal): 3.5% processing fee

    Damaged or Defective Items

    If your order arrives damaged or defective, you must contact us within 48 hours of delivery at sales@berryperformancesales.com. Claims reported outside this window may not be eligible for resolution.

    When contacting us, please include:

    • Your order number
    • A description of the issue
    • Clear photos or video of the damage or defect

    If your item was damaged during shipping, this is handled as a carrier claim separate from our standard return process — we will assist you in filing that claim. Items confirmed to be defective due to a manufacturing or fulfillment error will have return shipping costs covered by Berry Performance Sales.

    Refunds

    Once we receive and inspect your return, refunds are processed within 3–5 business days back to your original payment method. You'll receive a confirmation once it's been issued.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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